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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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微通道中高分子运动的耗散粒子动力学模拟
DOI: 10.3724/SP.J.1105.2012.11345, PP. 720-727
Keywords: 耗散粒子动力学,高分子悬浮运动,微流动
Abstract:
对不同长度及不同数量的高分子链在微直通道及微缩通道中的流动进行了模拟与分析.研究表明,高分子链的伸展状态与微通道的形状密切相关,微直通道中高分子链能较充分地伸展,方形微缩通道中高分子链未能充分伸展,而斜坡微缩通道中高分子链的伸展状态介于微直通道与方形微缩通道之间.高分子的存在对微通道系统的温度没有明显影响,对密度与水平流动速度有较明显的影响.高分子链的运动直接影响到周围的简单流体粒子,降低其周围流体粒子的流动速度,对密度与速度产生局部扰动,形成"拖曳"现象.高分子链分布越密集,长度越长,高分子链的拖曳现象越明显.
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